Trans choke inverter and drive An input choke is installed at the entrance of all types of drives for three-phase electricity. The input choke is for each phase of the coil to prevent fluctuations caused by electricity and prevent damage to the electric drive, and it can be of different power and amperes. Khahrani Industrial is a supplier of all types of Dc drives for all types of Dc electric motors and peripheral equipment, such as taco generators, encoders, chokes and strainers, drives and electric motors